/*
* Conditions Of Use 
* 
* This software was developed by employees of the National Institute of
* Standards and Technology (NIST), an agency of the Federal Government.
* Pursuant to title 15 Untied States Code Section 105, works of NIST
* employees are not subject to copyright protection in the United States
* and are considered to be in the public domain.  As a result, a formal
* license is not needed to use the software.
* 
* This software is provided by NIST as a service and is expressly
* provided "AS IS."  NIST MAKES NO WARRANTY OF ANY KIND, EXPRESS, IMPLIED
* OR STATUTORY, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTY OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, NON-INFRINGEMENT
* AND DATA ACCURACY.  NIST does not warrant or make any representations
* regarding the use of the software or the results thereof, including but
* not limited to the correctness, accuracy, reliability or usefulness of
* the software.
* 
* Permission to use this software is contingent upon your acceptance
* of the terms of this agreement
*  
* .
* 
*/
package gov.nist.javax.sip.address;
import java.text.ParseException;

import javax.sip.address.URI;

/**
 * Implementation of the URI class. This relies on the 1.4 URI class.
 *
 * @author M. Ranganathan   <br/>
 * @version 1.2 $Revision: 1.8 $ $Date: 2007/10/22 03:38:22 $
 *
 * 
 */
public class GenericURI extends NetObject implements javax.sip.address.URI {
	/**
	 * 
	 */
	private static final long serialVersionUID = 3237685256878068790L;
	public static final String SIP = ParameterNames.SIP_URI_SCHEME;
	public static final String SIPS = ParameterNames.SIPS_URI_SCHEME;
	public static final String TEL = ParameterNames.TEL_URI_SCHEME;
	public static final String POSTDIAL = ParameterNames.POSTDIAL;
	public static final String PHONE_CONTEXT_TAG =
		ParameterNames.PHONE_CONTEXT_TAG;
	public static final String ISUB = ParameterNames.ISUB;
	public static final String PROVIDER_TAG = ParameterNames.PROVIDER_TAG;

	/** Imbedded URI
	 */
	protected String uriString;

	protected String scheme;

	/** Consturctor
	 */
	protected GenericURI() {
	}

	/** Constructor given the URI string
	 * @param uriString The imbedded URI string.
	 * @throws java.net.URISyntaxException When there is a syntaz error in the imbedded URI.
	 */
	public GenericURI(String uriString) throws ParseException {
		try {
			this.uriString = uriString;
			int i = uriString.indexOf(":");
			scheme = uriString.substring(0, i);
		} catch (Exception e) {
			throw new ParseException("GenericURI, Bad URI format", 0);
		}
	}

	/** Encode the URI.
	 * @return The encoded URI
	 */
	public String encode() {
		return uriString;
	}

	public StringBuffer encode(StringBuffer buffer) {
		return buffer.append(uriString);
	}

	/** Encode this URI.
	 * @return The encoded URI
	 */
	public String toString() {
		return this.encode();

	}

	/** Returns the value of the "scheme" of
	 * this URI, for example "sip", "sips" or "tel".
	 *
	 * @return the scheme paramter of the URI
	 */
	public String getScheme() {
		return scheme;
	}

	/** This method determines if this is a URI with a scheme of
	 * "sip" or "sips".
	 *
	 * @return true if the scheme is "sip" or "sips", false otherwise.
	 */
	public boolean isSipURI() {
		return this instanceof SipUri;
	}
	
	// @Override
	public boolean equals(Object that) {
		if (this==that) return true;
		else if (that instanceof URI) {
			final URI o = (URI) that;
			
			// This is not sufficient for equality; revert to String equality...
			// return this.getScheme().equalsIgnoreCase( o.getScheme() )
			return this.toString().equalsIgnoreCase( o.toString() );				
		}
		return false;
	}
	
	public int hashCode() {
		return this.toString().hashCode();
	}
}
